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(ModeL) J. G. WILLARD. Globe and other Valves.

No. 233,902. Patented Nov. 2,1880.

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' ATENT JOEL G. WILLARD, OF NEW YORK, N. Y.

GLOBE AND OTHER VALVES.

SPECIFICATION forming part of Letters Patent No. 233,902, dated November 2, 1880.

Application filed June 29. 1880.

To all whom it may concern:

Be it known that I, J OEL G. WILLARD, of the city, county, and State of New York, have invented a new and useful Improvement in Globe and other Valves, of which the following is a specification.

The invention relates to a simple and inexpensive means of securing the cap of the stuffin g-box to its head so that it may revolve freely when turned in one direction, but be held by the spring-catch when to be turned in the opposite direction.

The invention consists in the cutting of one or more slots or channels upon the inside of the cap of astuffing-box and of sinking a spring intoachan nel cutin the head-piece of the valve, so that the spring, when operating, forces itself into the slot in the cap of the box whenever presented, and at the same time the impinging side of the spring is shaped so that the cap of the stuffing-box moves with freedom when being turned to its place, but is held fast when the motion is reversed, except when the spring is depressed by the thumb of the hand or some other convenient manipulator.

In the accompanying drawings, Figure 1 is a side elevation of a common globe-valve with the cap of the stuffing-box removed a short distanee from the head-piece. This shows the spring located in the body of the head-piece and extending through the threads of the headpiece nearly to the top. Fig. 2 is a cross-section of the head-piece out through the line :0 of Fig. 1. This shows the channel for the spring and the spring itself. Fig. 3 is a view of the under side of the cap of the stuffing-box, showing in this case three slots or channels out upon the inside. Fig. 4. is a cross-section of the spring located within the space occupied by the threads of the headpiece. This shows (Model) a slope upon one side of the spring, but a square corner upon the other to engage with the cap of the stuffing-box in event of a reverse motion. Fig. 5 is a side elevation of the spring, showing a projection upon one face for the pressure of the thumb when the reverse movement of the cap is desired.

' In each figure the same letters designate the same parts.

In Fig. 1 the spring in its position is seen at A, and the cap of the stufiing-box at B. In Fig. 3 the several channels out upon the inside of the cap of stuffing-box, each with one sloping side, are seen at C. In Fig. 5 the projection for the thumb is seen at D.

In the use of valves much annoyance and danger occur in consequence of the perpetual turning backward of the cap of stuflingboxes on the head-pieces of valves. This reverse motion of the cap is caused by the friction of the cap upon the valve-stem, and also from the enlargement of the stem itself when under a high heat and the stem reversed for the necessary manipulation of the valve. The purpose of this simple device is to prevent the reverse motion of the cap of stufIing-boxes, except when desired by the manipulator, by a pressure upon the thumb-piece of the spring.

I prefer the partially-concealed spring herewith shown and described, and wish to be protected in my rights thereto.

I claim- A head-piece and stuffing-box of a valve, provided with a spring, in combination with a stuffing-box cap having internal lockcatches, whereby the cap is automatically looked, substantially as described.

Witnesses: JOEL G. WILLARD.

Tnos. B. CLIFFORD, ANTHONY HEIDT. 

